Major Issue
2019-01-17 10:27:16 31262 139800695668864 WARNING nxdrive.engine.engine Thread is not responding - terminate it Qt has caught an exception thrown from an event handler. Throwing exceptions from an event handler is not supported in Qt. You must not let any exception whatsoever propagate through Qt code. If that is not possible, in Qt 5 you must at least reimplement QCoreApplication::notify() and catch all exceptions there.
This is generating a lot of events in Sentry.
Cause
When the function called by a signal raises any exception. Qt does not allow that.
Fix
Catch exception in QApplication.notify() and (try to) gracefully join QThreads.
